I am using the same transmission mount but different engine. Here is the
link to the kit I am using. I don't remember exactly how much room I had but it was tight when I still had the cab on the frame. I had the engine about 2 inches from the cab, plus i do remember the transmission hitting the floor (what was left of it). I am going to put a small hump in anyway just to make sure I have plenty of room. Hope that helps!